Scattering of plane sh waves by a semi‐cylindrical hill
Scattering of plane sh waves by a semi‐cylindrical hill
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DOI：
10.1002/eqe.4290211205
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发表时间：
1992
影响因子：
4.5
通讯作者：
X. Yuan;F. Men
中科院分区：
文献类型：
--
作者：
X. Yuan;F. Men
利用波函数级数和一种新的展开技术，提出了一种新的解析方法来研究平面SH波在均匀、各向同性和弹性的二维半空间中对半圆柱形山丘的散射问题。结果表明：(1)山丘对山丘及其周围点的地面运动都有相当大的影响；(2)这些影响主要取决于入射波的频率、入射角和山丘半径与入射波波长的二分之一之比；(3)对于相同的入射波，具有相同形状和半径的隆起和凹陷地形会导致不同的波传播机制。这些结果无疑将有助于进一步加深对突出地形对地震地面运动影响的认识，并有助于检验迄今可用的各种近似方法的准确性。
A new analytical method is presented to study the problem of scattering of plane SH waves by a semi-cylindrical hill in an otherwise homogeneous, isotropic and elastic two-dimensional half-space, using the series of wave functions and a new expansion technique. The results obtained show that (1) the hill has quite considerable effects on ground motions for both the points on the hill and its environs, (2) these effects depend mainly on the frequency, the angle of wave incidence and the ratio of radius of hill to one-half the wave length of incident waves, and (3) prominent and depression topographies having equal form and radius for the same incident waves would cause quite different mechanisms of wave propagation in both response performance and magnitude. The results, doubtless, would be useful for further deepening knowledge of the effects of prominent topography on seismic ground motion and for testing the accuracy of various approximate methods so far available.